package org.github.rayson517.easyplatform.common.web.util;

import java.math.BigDecimal;    
/**  
 * com.util.AmountUtils  
 * 金额元分之间转换工具类   
 */    
public class AmountUtils {    
	/**金额为分的格式 */    
	public static final String CURRENCY_FEN_REGEX = "\\-?[0-9]+";    
	/**   
	 * 将分为单位的转换为元并返回金额格式的字符串 （除100）  
	 * @param amount  
	 * @return  
	 * @throws Exception   
	 */    
	public static String changeFtoY(Long amount) throws Exception{    
		if(!amount.toString().matches(CURRENCY_FEN_REGEX)) {    
			throw new Exception("金额格式有误");    
		}  
		int flag = 0;    
		String amString = amount.toString();    
		if(amString.charAt(0)=='-'){    
			flag = 1;    
			amString = amString.substring(1);    
		}    
		StringBuffer result = new StringBuffer();    
		if(amString.length()==1){    
			result.append("0.0").append(amString);    
		}else if(amString.length() == 2){    
			result.append("0.").append(amString);    
		}else{    
			String intString = amString.substring(0,amString.length()-2);    
			for(int i=1; i<=intString.length();i++){    
				if( (i-1)%3 == 0 && i !=1){    
					result.append(",");    
				}    
				result.append(intString.substring(intString.length()-i,intString.length()-i+1));    
			}    
			result.reverse().append(".").append(amString.substring(amString.length()-2));    
		}    
		if(flag == 1){    
			return "-"+result.toString();    
		}else{    
			return result.toString();    
		}    
	}    
	/**  
	 * 将分为单位的转换为元 （除100）  
	 * @param amount  
	 * @return  
	 * @throws Exception   
	 */    
	public static String changeFtoY(String amount) throws Exception{    
		if(!amount.matches(CURRENCY_FEN_REGEX)) {    
			throw new Exception("金额格式有误");    
		} 
		return BigDecimal.valueOf(Long.valueOf(amount)).divide(new BigDecimal(100)).toString();    
	}    
	/**   
	 * 将元为单位的转换为分 （乘100） 
	 * @param amount  
	 * @return  
	 */    
	public static String changeYtoF(Long amount){    
		return BigDecimal.valueOf(amount).multiply(new BigDecimal(100)).toString();    
	}    
	/**   
	 * 将元为单位的转换为分 替换小数点，支持以逗号区分的金额  
	 *   
	 * @param amount  
	 * @return  
	 */    
	public static String changeYtoF(String amount){    
		String currency =  amount.replaceAll("\\$|\\￥|\\,", "");  //处理包含, ￥ 或者$的金额    
		int index = currency.indexOf(".");    
		int length = currency.length();    
		Long amLong = 0l;    
		if(index == -1){    
			amLong = Long.valueOf(currency+"00");    
		}else if(length - index >= 3){    
			amLong = Long.valueOf((currency.substring(0, index+3)).replace(".", ""));    
		}else if(length - index == 2){    
			amLong = Long.valueOf((currency.substring(0, index+2)).replace(".", "")+0);    
		}else{    
			amLong = Long.valueOf((currency.substring(0, index+1)).replace(".", "")+"00");    
		}    
		return amLong.toString();    
	}    

	 public static void main(String[] args) {    
        System.out.println(AmountUtils.changeYtoF("1.33"));    
        try {  
            System.out.println(AmountUtils.changeFtoY("1322"));  
        } catch (Exception e) {  
            e.printStackTrace();  
        }            
    }
}    